In our everyday lives, there are objects everywhere around us. On each of these objects, there are forces acting upon them and go on unnoticed. For example, look at this tiny skateboard. One force acting upon it is its weight, or mass x gravity (mg). This object isn't moving, thus it isn't accelerating. With that said, that means that this object is at static equilibrium. Another force acting upon this object is the normal force (N) which is from the surface it's sitting on, (in this case the carpet). Friction, or the contact force between two objects also exist between the skateboard and the carpet.
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